Pure Micro Python without Ui-Flow on my M5Stack core2
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The latest lv_micropython can be built for the 'M5CORE2'-board.
(I used ESP-IDF v4.0.2 on Ubuntu 20.04)Stuff I tested successfully on my M5Core2:
- display with lvgl widgets
- touchscreen
- WLAN
- RTC
- SDCard (read)
Might be interesting for people searching pure Micropython + lvgl on the Core2.
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@dhed
hi Dhed, is it possible for you to share the last bin pure lv_micropython firmware for M5CORE ?
it's been several days i 'm trying to compile it but i'm a win64 user... it's hard for me.
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@favnec5 said in Pure Micro Python without Ui-Flow on my M5Stack core2:
@dhed
hi Dhed, is it possible for you to share the last bin pure lv_micropython firmware for M5CORE ?
it's been several days i 'm trying to compile it but i'm a win64 user... it's hard for me.Here's my compiled firmware: zippyshare-link.
Should be flashable with:esptool.py --chip esp32 -p COM3 -b 460800 erase_flash esptool.py -p COM3 -b 460800 --before default_reset --after hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 16MB 0x8000 partition-table.bin 0x1000 bootloader.bin 0x10000 micropython.bin(flashing works even under Windows with the ESP-IDF toolchain installed)
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@dhed
Hi, thank you for your firmware.
I try lot of things. There is a problem to use SDCard with display driver a the same SPI. SDCard is down :-/
Do you know this problem ?
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@favnec5
My workaround for this (known) problem:- during boot mount the sdcard and load files to ram
- then unmout the sdcard
- initialize the display
something like:
import uos from machine import Pin, SDCard sdcard = SDCard(slot=2, sck=Pin(18), miso=Pin(38), mosi=Pin(23), cs=Pin(4), freq=40000000) uos.mount(sdcard, '/sd') ... uos.umount('/sd') sdcard.deinit()before initializing the display:
from ili9XXX import ili9341 lcd = ili9341(spihost=1, mosi=23, miso=38, clk=18, dc=15, cs=5, invert=True, rot=0xC0, width=320, height=240, rst=-1, power=-1, backlight=-1)I'm loading weathericons to use with openweathermap that way.
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Hi, the problem is, for me, that i need to write files to the sdCard like a datalogger. I think old lobo’s version do the job but not lv_micropython… @m5stack : official pure m5stack needed to use the core 2 functionalities OR hidden start menu version of uiflow.
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@favnec5 Here is another Micropython port for the Core2. Already thried that with my core2: https://github.com/thuehlinger/micropython-core2
Another note: you do not need to use another firmware, you can use Micropython directly by just not using uiflow. See my repo https://github.com/hjgode/m5home within the lv dir: lv_test.py
Be warned, the LV Binding is not very well documented and often only links to the C API.
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I tried to get your compiled firmware, but that ZippyShare site keeps trying to download other things and I can't get it to download your file.
Thanks,
/Chris
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@purpledread That link still works for me, but here it is uploaded to an alternative.
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Thanks, the new upload link worked.
/Chris
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That's all working now, including using ampy to copy files and run code.
I'm use to using Mu Editor with my other ESP32 boards.
Is there some way to run Python code and get back error messages if there is an issue in the code?
Thanks!
/Chris
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@purpledread
I'm using VSCode with the PyMakr extension (see LeMaRiva's blog for install-instructions).
Nice IDE with integrated serial-console for REPL and up-/downloading of files.But I guess any serial-console (i.E. PuTTY) should allow you to see error messages.
Also check micropython.org for instructions to get a REPL over the serial port.
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I'm trying to read from the SD card on startup and then use the display.
If I access the sd card, the program runs with no errors, but nothing displays.
I tried initializing the display using the example you gave, but I get an error that there isn't enough DMA-able memory to allocate the display buffer.
/Chris
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Sorry for the newbe questions. You've been a big help.
When you say you load files to ram from the boot.py file, how do you access that ram from the main.py file?
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Is it possible to use m5stack_ui here?
How do it?